When I was a kid Circuit Assemblies were Friday night session, start Saturday Morning short meeting then Field Service , sessions afternoon and evening. Sunday the same but finish perhaps around
As kids we used to hang out and socialize when they were out " on the work"
They were held in town halls, school assembly halls ...anywhere. once I remember an army drill hall with a large field gun at the back.
We used to have food though. The temporary kitchens they built would grace an army ....health and safety? . Hot dinners on trays plus a cold buffet... better than taking sandwiches .
Looking back... yes they were fun, .meeting friends , helping (or hindering) the workers . The programme was often more like amateur theatrics too.